Malicious PDF — malware analysis report

Static analysis result for SHA-256 49132e6c3f0074ed…

MALICIOUS

PDF

72.8 KB Created: 2021-02-21 05:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 2ff56e8bf48238aa7f999c0205bacdb3 SHA-1: 7116de36a3f05930df9142fee0872417fa63f4ed SHA-256: 49132e6c3f0074ed7f8c2fda6f0fadf4e2659a2ade47259516ea4a3045b12481
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, identified as a link farm designed to direct users to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically related to phishing. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to lead users to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://maypoin.ru/123?utm_term=can+you+take+best+friends+off+snapchat PDF link annotation
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/6657837.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/06ee58fbad11fe.pdfIn PDF document text
    • http://dobomasinuraz.iblogger.org/pstet_syllabus_2019.pdfIn PDF document text
    • https://zizonilorixu.weebly.com/uploads/1/3/4/7/134772478/c64e41c70.pdfIn PDF document text
    • https://lesikikonojen.weebly.com/uploads/1/3/0/7/130740189/51fdce.pdfIn PDF document text
    • https://girosiwubu.weebly.com/uploads/1/3/0/7/130740458/5845269.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/67bce409390e7.pdfIn PDF document text
    • https://suterigegopos.weebly.com/uploads/1/3/2/6/132695321/tebunekojed_kadevofalewuzuk_vikuguvovo_fewodol.pdfIn PDF document text
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/a21693bb0db72b.pdfIn PDF document text
    • http://xinupavob.iblogger.org/44497251171.pdfIn PDF document text
    • https://sujumakatu.weebly.com/uploads/1/3/1/3/131379709/vetuvogodazafiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gatakokuto.rf.gd/kuberuxokixodoxo.pdfIn PDF document text
    • http://zekarevuwo.epizy.com/97656973889.pdfIn PDF document text
    • http://genenapukiral.epizy.com/bofutekubovak.pdfIn PDF document text
    • http://tunazafagid.epizy.com/transunion_credit_report_vs_equifax.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/the_world_in_2019_economist_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/android_developer_settings_don_t_save.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/64480294241.pdfIn PDF document text
    • http://tovedevekep.rf.gd/60480981768.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/97493202632.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0B 5424 bytes
SHA-256: f4e2a0137ea827acc6efaaf2fc7a52ba35ec8dd09bd2a487681457c9d3ef5b6b
font_01_sfnt_off0000f07c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07C 11032 bytes
SHA-256: e644b053f2ab479bb845e4ae3e7c88263de902bf9f7df3385a013de3146e60a4

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